Hello - 

I have provided two of the best contracts (ones that I actually use) for you to download. I thought about simply downloading them and giving you the file directly, but in order to avoid any copyright issues etc, here are the direct links to the providers of the contracts - 

Consultant Contract - 

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CE4QFjAA&url=http%3A%2F%2Fwww.iupui.edu%2F~facinfo%2FN485%2FContractor2.rtf&ei=NmjiT-uELOiw2wWR_qC1Cw&usg=AFQjCNHm8-QH86DzGClzYGF_OEDlVrXFzA&sig2=-S_Un0GyVtcIdFrWc5RcqA

Contract Amendment - 

http://www.nolo.com/legal-encyclopedia/sample-amendment-contract-33341.html